One sixtieths to frederick hess



{Nb Modl.)

N. FALLEK. OPP SWITCH FOR TBLEPHONE'S.

v THROW- Patented May 10,1898.

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UNITED STATES PATENT OFFICE.

NATHAN FALLEK, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF THIRTY- ONESIXTIETHS TO FREDERICK HESS, JR, ALBERT K. ANDRIANO, AND

ISIDORE HARRIS, OF SAME PLACE.

TH ROW-OFF SWITC H FOR TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 603,681, dated May 10,1898.

Application filed August 17, 1897. Serial No. 648,581. (No model.)

To all whom it may concern:

Be it known that I, NATHAN FALLEK, a citizen of the United States,residing in the city and county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inAutomatic Throw- Off Switches for Oflice Telephone Systems, of which thefollowing is a specification.

This invention relates to an improved automatic switch for localtelephones of that kind or description generally known as officetelephone systems, in which a number of rooms, offices, or stationslocated in different parts of the same building are supplied I I 5 withtransmitters and receivers and signaling mechanism all interconnectedthrough a switch in each room or at each station in such manner that aperson at anyone of the stations or telephones in the system can call upand communicate with a person located at any other station.

My present improvement in throw-off switches of this character consistsinthe described construction and combination of parts, having for itsobject to provide asimple and inexpensive throw-off device that can bereadily applied to most of the constructions of switches of this kind inuse, as hereinafter more fully set forth, and pointed out in the claimat the end of this specification, reference being had to theaccompanying drawings, in which Figure 1 represents in front elevation anine-point switch constructed according to 3 5 my invention and arrangedfor operation with the telephone-hook of an ordinary battery andtransmitter-box. of the same parts, taken from the right-hand side ofFig. 1. showing the front of the box in section. Figs. 3 and 4 aredetails of the tripping device connected with and Worked by thetelephone-hook, Fig. 3 being aside View of the tripping-lever andconnected parts and Fig. 4 an end view taken from the righthand side ofFig. 3. Fig. 5 is a rear view of the switch, looking at the back of theboard on which the parts are mounted.

A indicates the switch-lever; of, its pivot; B, the slot in the board orfront of the case containing the parts that look the switch- Fig. 2 is aside view lever in any given position; D D D 850., the contact-points ofthe several lines composing the system; E, a coil-spring acting to bringthe switch-lever back to its first position, from which it starts ineach setting operation.

F is a ratchet-bar attached to the lever A and having teeth f on its topedge corresponding in number with the contact-points on the switchboard.I

G is a pawl or dog set to engage the teeth of the ratchet-bar, and g isaspring-arm attached at one end to the fixed point 9 H is a short leverworking on a pivot h and carrying on its inner end a tappet-finger I,the opposite end of the lever being brought through a slot in theswitchboard or case into working position under the arm g The piece I isattached to the end of the lever H by a pivot-joint 'm to swing looselyin a backward direction when struck from the front, but to maintainarigid position about perpendicular to the lever when struck from behind.M is an arm rigidly secured to the lever-arm 10 of the telephone-hookWand extending upward therefrom to the lever H. The end of this arm isprovided with a wedge-shaped block 7%, projecting from one side toengage and pass over a similar incline m with which the tappet-piece Iis provided, the faces of these two inclines being so arranged withrelation to each other and of such degree of inclination that themovement of the end of the arm M in an are from the pivot of thetelephone-hook as a center will cause the incline on the arm to drawdown the piece I in the forward movement of the arm, or in the directionindicated by the arrow in Fig. 1, and thus to draw down the outer end ofthe lever H. In the contrary move- I tached switch-lever A; of thespring E, the ratchet-toothed bar F, the sliding dog G, spring-arm gpivoted lever H, pivoted piece I on the end of said lever and the arm onthe telephone-hook having the inclines k on the end to engage theinclines on the said piece I, constructed for operation as set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal.

NATHAN FALLEK. [L. s] Witnesses:

O. W. M. SMITH, W. T. HESS.

